Portion of an electronic mouse



FIG. 1 is a front-left perspective view of a portion of an electronic mouse showing my new design;

FIG. 2 is a rear-left perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a top view thereof.

The broken line showings of portions of the electronic mouse, including the wheel well, side bumps and lower body region, are made for illustrative purposes only, and form no part of the claimed design. 

The ornamental design for a portion of an electronic mouse, as shown and described. 